See title. I'm curious to know when the first mentions of the holocaust were. I've seen some things to suggest they were long after WWII, and it took until the 70s for it to appear in encyclopedias and dictionaries. However on the contrary we have books like If This Is a Man by Primo Levi which was published in October 1947, only two years after he left Auschwitz, and published a few months earlier was Diary of a Young Girl in June of 1947. Are there any earlier? News reports, survivor accounts, whatnot?
However, information about the event itself, i.e the official story with gassing of exactly 6M kikes, who were all comically excuted, with 15M sovivors appearing out of nowhere later on didn't became common until around the 70's.
Encyclopedia Britannica has no mention of any holocaust before 1971 for instance. Which is interesting, if the official story had any truth in it, they would have known what happened much earlier and the event would have been included in such large and old encyclopedia which mentions many real genocides around the world, long before the 70's.